/****************************************************************************
* cs50.h
*
* version 1.1.5
*
* Computer Science 50
* Glenn Holloway
* David J. Malan
*
* Declarations for CS50's library.
* Based on Eric Roberts' genlib.h and simpio.h.
*
* The latest version of this file can be found at
* http://cs50.net/pub/releases/cs50/cs50.h.
*
* To compile as a static library on your own system:
* % gcc -c -ggdb -std=c99 cs50.c -o cs50.o
* % ar rcs libcs50.a cs50.o
* % rm -f cs50.o
* % cp cs50.h /usr/local/include
* % cp libcs50.a /usr/local/lib
***************************************************************************/
#ifndef _CS50_H
#define _CS50_H
#include
#include
/*
* Borrow the standard library's data type for Boolean variables whose
* values must be (true|false).
*/
#include
/*
* Our own data type for string variables.
*/
typedef char *string;
/*
* Reads a line of text from standard input and returns the equivalent
* char; if text does not represent a char, user is prompted to retry.
* Leading and trailing whitespace is ignored. If line can't be read,
* returns CHAR_MAX.
*/
char
GetChar(void);
/*
* Reads a line of text from standard input and returns the equivalent
* double as precisely as possible; if text does not represent a
* double, user is prompted to retry. Leading and trailing whitespace
* is ignored. For simplicity, overflow and underflow are not detected.
* If line can't be read, returns DBL_MAX.
*/
double
GetDouble(void);
/*
* Reads a line of text from standard input and returns the equivalent
* float as precisely as possible; if text does not represent a float,
* user is prompted to retry. Leading and trailing whitespace is ignored.
* For simplicity, overflow and underflow are not detected. If line can't
* be read, returns FLT_MAX.
*/
float
GetFloat(void);
/*
* Reads a line of text from standard input and returns it as an
* int in the range of [-2^31 + 1, 2^31 - 2], if possible; if text
* does not represent such an int, user is prompted to retry. Leading
* and trailing whitespace is ignored. For simplicity, overflow is not
* detected. If line can't be read, returns INT_MAX.
*/
int
GetInt(void);
/*
* Reads a line of text from standard input and returns an equivalent
* long long in the range [-2^63 + 1, 2^63 - 2], if possible; if text
* does not represent such a long long, user is prompted to retry.
* Leading and trailing whitespace is ignored. For simplicity, overflow
* is not detected. If line can't be read, returns LLONG_MAX.
*/
long long
GetLongLong(void);
/*
* Reads a line of text from standard input and returns it as a string,
* sans trailing newline character. (Ergo, if user inputs only "\n",
* returns "" not NULL.) Leading and trailing whitespace is not ignored.
* Returns NULL upon error or no input whatsoever (i.e., just EOF).
*/
string GetString(void);
#endif